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Changes for page 3.4 Protections

Last modified by Admin on 2025/04/09 12:19
From version 1.1
edited by Admin
on 2024/12/04 16:06
Change comment: There is no comment for this version
To version 2.1
edited by Admin
on 2024/12/04 16:33
Change comment: There is no comment for this version

Summary

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Content
... ... @@ -6,15 +6,13 @@
6 6  
7 7  The BMS Main 3 device continuously monitors the state of the cells, the external environment and, when detecting abnormalities, protects the battery and system components from damage.
8 8  
9 -1.
10 -11.
11 -111. Overcurrent
9 +=== Overcurrent ===
12 12  
13 13  The BMS Main 3 device performs the overcurrent protection depending on current sensor values.
14 14  
15 15  To change the overcurrent protection of the battery, select the "Protections → Overcurrent" section:
16 16  
17 -[[image:1733328382376-958.png]]
15 +[[image:1733328382376-958.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
18 18  
19 19  In this section:
20 20  
... ... @@ -39,18 +39,18 @@
39 39  * the current is positive (charging) or zero, and its modulo value is less than the “Tolerant charging current” value for the “Delay before clearing the error” time;
40 40  * the current is negative (discharging) or zero, and its modulo value is less than the “Tolerant discharging current” value for the “Delay before clearing the error” time.
41 41  
42 -If there is the "Overcurrent" error, the charging contactor and discharging contactor open.
40 +(% class="box infomessage" %)
41 +(((
42 +If there is the "Overcurrent" error, the **charging **and **discharging **contactors open.
43 +)))
43 43  
45 +=== Undervoltage ===
44 44  
45 -1.
46 -11.
47 -111. Undervoltage
48 -
49 49  The BMS Main 3 device implements battery protection from too low voltage on the cells.
50 50  
51 51  To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
52 52  
53 -[[image:1733328382380-760.png]]
51 +[[image:1733328382380-760.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="127" width="800"]]
54 54  
55 55  In this section:
56 56  
... ... @@ -71,18 +71,18 @@
71 71  
72 72  * the minimum voltage among all cells of the battery is greater than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
73 73  
74 -If there is the "Undervoltage" error, the discharging contactor opens.
72 +(% class="box infomessage" %)
73 +(((
74 +If there is the "Undervoltage" error, the **discharging **contactor opens.
75 +)))
75 75  
77 +=== Overvoltage ===
76 76  
77 -1.
78 -11.
79 -111. Overvoltage
80 -
81 81  The BMS Main 3 device implements battery protection from too high voltage on the cells.
82 82  
83 83  To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
84 84  
85 -[[image:1733328382382-607.png]]
83 +[[image:1733328382382-607.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
86 86  
87 87  In this section:
88 88  
... ... @@ -104,18 +104,18 @@
104 104  
105 105  * the maximum voltage among all cells of the battery is less than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
106 106  
107 -If there is the "Overvoltage" error, the charging contactor and discharging contactor open (if the “Switch off the discharging contactor on error” flag is set).
105 +(% class="box infomessage" %)
106 +(((
107 +If there is the "Overvoltage" error, the **charging** contactor and **discharging **contactor open (if the “Switch off the discharging contactor on error” flag is set).
108 +)))
108 108  
110 +=== Low temperature ===
109 109  
110 -1.
111 -11.
112 -111. Low temperature
113 -
114 114  The BMS Main 3 device implements battery protection from too low temperature.
115 115  
116 116  To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
117 117  
118 -[[image:1733328382382-670.png]]
116 +[[image:1733328382382-670.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="800"]]
119 119  
120 120  In this section:
121 121  
... ... @@ -138,17 +138,19 @@
138 138  
139 139  * the minimum temperature among all cells of the battery is greater than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
140 140  
141 -If there is the "Low temperature (CH)" error, the charging contactor opens. If there is the "Low temperature (DCH)" error, the discharging contactor opens.
139 +(% class="box infomessage" %)
140 +(((
141 +If there is the "Low temperature (CH)" error, the **charging **contactor opens.
142 +If there is the "Low temperature (DCH)" error, the **discharging **contactor opens.
143 +)))
142 142  
143 -1.
144 -11.
145 -111. High temperature
145 +=== High temperature ===
146 146  
147 147  The BMS Main 3 device implements battery protection from too high temperature.
148 148  
149 149  To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
150 150  
151 -[[image:1733328399408-279.png]]
151 +[[image:1733328399408-279.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
152 152  
153 153  In this section:
154 154  
... ... @@ -171,16 +171,17 @@
171 171  
172 172  * the maximum temperature among all cells of the battery is less than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
173 173  
174 -If there is the "High temperature (CH)" error, the charging contactor opens. If there is the "High temperature (DCH)" error, the discharging contactor opens.
174 +(% class="box infomessage" %)
175 +(((
176 +If there is the "High temperature (CH)" error, the **charging **contactor opens.
177 +If there is the "High temperature (DCH)" error, the **discharging **contactor opens.
178 +)))
175 175  
180 +=== Battery cover ===
176 176  
177 -1.
178 -11.
179 -111. Battery cover
180 -
181 181  To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
182 182  
183 -[[image:1733328399410-529.png]]
184 +[[image:1733328399410-529.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="113" width="800"]]
184 184  
185 185  In this section:
186 186  
... ... @@ -199,18 +199,18 @@
199 199  
200 200  * no signal from the battery cover during the “Delay before clearing the error” time.
201 201  
202 -**If there is the "Battery cover error", the “Critical error” is generated and all contactors open.**
203 +(% class="box warningmessage" %)
204 +(((
205 +If there is the "Battery cover error", the **“Critical error” **is generated **and all contactors open.**
206 +)))
203 203  
208 +=== High humidity ===
204 204  
205 -1.
206 -11.
207 -111. High humidity
208 -
209 209  The BMS Main 3 can detect that the battery is operating in high humidity conditions.
210 210  
211 211  To change the detection parameters, select the "Protections → High humidity" section:
212 212  
213 -[[image:1733328399412-184.png]]
214 +[[image:1733328399412-184.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="106" width="800"]]
214 214  
215 215  In this section:
216 216  
... ... @@ -231,18 +231,18 @@
231 231  
232 232  * the measured humidity is less than the “Tolerant humidity” during the “Delay before clearing the error” time.
233 233  
235 +(% class="box infomessage" %)
236 +(((
234 234  If there is the "High humidity" error, no action is taken. The error is indicative.
238 +)))
235 235  
240 +=== Water ===
236 236  
237 -1.
238 -11.
239 -111. Water
240 -
241 241  The BMS Main 3 can protect the battery from working in very high humidity conditions.
242 242  
243 243  To change the protection parameters, select the "Protections → Water" section:
244 244  
245 -[[image:1733328399413-393.png]]
246 +[[image:1733328399413-393.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
246 246  
247 247  In this section:
248 248  
... ... @@ -263,16 +263,16 @@
263 263  
264 264  * the measured humidity is less than the “Tolerant humidity” value during the “Delay before clearing the error” time.
265 265  
266 -**If there is the “Water” error, the “Critical error” is generated and all relays open.**
267 +(% class="box infomessage" %)
268 +(((
269 +If there is the “Water” error, the **“Critical error”** is generated and **all relays open**.
270 +)))
267 267  
272 +=== High Logic temperature ===
268 268  
269 -1.
270 -11.
271 -111. High Logic temperature
272 -
273 273  To change the overheating protection parameters of BMS Logic devices, select the "Protections → High Logic temperature" section:
274 274  
275 -[[image:1733328399414-280.png]]
276 +[[image:1733328399414-280.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
276 276  
277 277  In this section:
278 278  
... ... @@ -293,16 +293,16 @@
293 293  
294 294  * a BMS Logic device temperature is less than the “Tolerant temperature” value.
295 295  
296 -**Cell balancing is prohibited for overheated Logic devices.**
297 +(% class="box warningmessage" %)
298 +(((
299 +Overheated Logic devices do not balance cells.
300 +)))
297 297  
302 +=== Logic offline ===
298 298  
299 -1.
300 -11.
301 -111. Logic offline
302 -
303 303  To change the protection parameters from loss of communication with BMS Logic devices, select the "Protections → Logic offline" section:
304 304  
305 -[[image:1733328399416-818.png]]
306 +[[image:1733328399416-818.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="86" width="800"]]
306 306  
307 307  In this section:
308 308  
... ... @@ -319,4 +319,510 @@
319 319  
320 320  * all connected BMS Logic devices respond to the commands of the BMS Main device.
321 321  
322 -**If there is the "Logic offline" error, the “Critical error” is generated and all relays open.**
323 +(% class="box warningmessage" %)
324 +(((
325 +If there is the "Logic offline" error, the **“Critical error” **is generated and **all relays open.**
326 +)))
327 +
328 +=== Cell count ===
329 +
330 +To change the protection parameters from the mismatch of the number of cells to the set value, select the "Protections → Cell count" section:
331 +
332 +[[image:1733328415731-223.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
333 +
334 +In this section:
335 +
336 +* Enable – a flag to enable the protection;
337 +* Number of cells – a number of cells connected to the BMS;
338 +* Delay before setting the error, millisecond;
339 +* Delay before clearing the error, second;
340 +* Lock – a flag to block the error until the device is restarted.
341 +
342 +As a result of the operation of the protection from the mismatch of the number of cells, the "Cell count error" is generated.
343 +
344 +Error generation conditions:
345 +
346 +* the number of cells connected to the BMS is **not equal** to the “Number of cells” value during the “Delay before setting the error” time.
347 +
348 +Conditions for removing the error:
349 +
350 +* the number of cells connected to the BMS is **equal** to the “Number of cells” value during the “Delay before clearing the error” time.
351 +
352 +(% class="box warningmessage" %)
353 +(((
354 +If there is the "Cell count error", the **“Critical error” **is generated and **all relays open.**
355 +)))
356 +
357 +=== Logic count ===
358 +
359 +To change the protection parameters from the mismatch of the number of BMS Logic devices to the set value, select the "Protections → Logic count” section:
360 +
361 +[[image:1733328415732-163.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
362 +
363 +In this section:
364 +
365 +* Enable – a flag to enable the protection;
366 +* Logic count – a number of BMS Logic devices connected to the BMS Main;
367 +* Scan fast – a flag to scan BMS Logic devices fast (devices with addresses from 1 to “Logic count” are scanned; this mode reduces BMS system startup time);
368 +* Lock – lock the error until the device is reset.
369 +
370 +As a result of the operation of the protection from the mismatch of the number of BMS Logic devices, the "Logic count error" is generated.
371 +
372 +Error generation conditions:
373 +
374 +* the number of BMS Logic devices connected to the BMS Main is **not equal** to the “Logic count” value.
375 +
376 +Conditions for removing the error:
377 +
378 +* the number of BMS Logic devices connected to the BMS Main is **equal** to the “Logic count” value.
379 +
380 +(% class="box warningmessage" %)
381 +(((
382 +If there is the "Logic count error", the **“Critical error”** is generated and **all relays open.**
383 +)))
384 +
385 +=== Short circuit ===
386 +
387 +The BMS Main 3 device implements the protection of power circuits (contactors, power wires) against overheating caused by the flow of high current for a long time.
388 +
389 +To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
390 +
391 +[[image:1733328415733-309.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="210" width="800"]]
392 +
393 +In this section:
394 +
395 +* Level 1, 2, 3 – three protection levels. The following parameters are configured at each level:
396 +** Enable – a flag to enable the protection;
397 +** Maximum current, A;
398 +** Delay before setting the error, second;
399 +* Switch off the charging contactor on error – a flag to open the charging contactor when the "Short circuit" error occurs;
400 +* Switch off the discharging contactor on error – a flag to open the discharging contactor when the "Short circuit" error occurs;
401 +* Delay before clearing the error, second;
402 +* Lock – a flag to block the error until the device is restarted.
403 +
404 +If there is a short circuit, the "Short circuit" error is generated.
405 +
406 +Error generation conditions:
407 +
408 +* at any of the three protection levels, the current modulo is greater than the “Maximum current” value during the “Delay before setting the error” time.
409 +
410 +Conditions for removing the error:
411 +
412 +* the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
413 +
414 +(% class="box infomessage" %)
415 +(((
416 +If there is the "Short circuit" error, **charging **contactor opens (if the “Switch off the charging contactor on error” flag is set) and **discharging **contactor opens (if the “Switch off the discharging contactor on error flag” is set).
417 +)))
418 +
419 +=== High contactor temperature ===
420 +
421 +The BMS Main 3 device protects power contactors from overheating. To measure the temperature of the contactor, one of the thermistors connected to the X5 connector is used.
422 +
423 +To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
424 +
425 +[[image:1733328415734-986.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
426 +
427 +In this section:
428 +
429 +* Enable – a flag to enable the protection;
430 +* Thermistor – a selection of which cell thermistor will be used as contactor temperature sensor;
431 +* Maximum contactor temperature, °C;
432 +* Tolerant contactor temperature, °C;
433 +* Delay before setting the error, second;
434 +* Switch off the charging contactor on error – a flag to open the charging contactor when the "High contactor temperature" error occurs;
435 +* Switch off the discharging contactor on error – a flag to open the discharging contactor when the "High contactor temperature" error occurs;
436 +* Delay before clearing the error, second;
437 +* Lock – a flag to block the error until the device is restarted.
438 +
439 +If there is a contactor overheat, the "High contactor temperature" error is generated.
440 +
441 +Error generation conditions:
442 +
443 +* the contactor temperature is greater than the “Maximum contactor temperature” value during the “Delay before setting the error” time.
444 +
445 +Conditions for removing the error:
446 +
447 +* the contactor temperature is lower than the “Tolerant contactor temperature” value during the “Delay before clearing the error” time.
448 +
449 +(% class="box infomessage" %)
450 +(((
451 +If there is the "High contactor temperature" error, **charging **contactor opens (if the “Switch off the charging contactor on error” flag is set) and **discharging **contactor opens (if the “Switch off the discharging contactor on error” flag is set).
452 +)))
453 +
454 +=== Current sensor ===
455 +
456 +The BMS Main 3 device checks the current sensor connection circuits. The circuits are checked for breakage and short-circuit to the +5 V supply line.
457 +
458 +To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
459 +
460 +[[image:1733328461552-948.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
461 +
462 +In this section:
463 +
464 +* Enable – a flag to enable the protection;
465 +* Maximum voltage, V;
466 +* Minimum voltage, V;
467 +* Voltage hysteresis – a hysteresis value to clear the error, V;
468 +* Delay before setting the error, second;
469 +* Delay before clearing the error, second;
470 +* Lock – a flag to block the error until the device is restarted.
471 +
472 +If there is an open or short circuit connection of a current sensor, the "Current sensor error" is generated.
473 +
474 +Error generation conditions:
475 +
476 +* the voltage in the signal line or reference line of the current sensor is greater than the “Maximum voltage” value during the “Delay before setting the error” time;
477 +* the voltage in the signal line or reference line of the current sensor is less than the “Minimum voltage” value during the “Delay before setting the error” time.
478 +
479 +Conditions for removing the error:
480 +
481 +* the voltage in the signal line or reference line of the current sensor is in range from (Minimum voltage + Voltage hysteresis) to (Maximum voltage - Voltage hysteresis) during the “Delay before clearing the error” time.
482 +
483 +(% class="box warningmessage" %)
484 +(((
485 +If there is the “Current sensor error”, the **“Critical error” **is generated and **all relays open.**
486 +)))
487 +
488 +=== Power switch ===
489 +
490 +BMS Main 3 device checks the status of power switches that are used to control the contactors. To change the parameters of the power switch protection, select the "Protections → Power switch" section:
491 +
492 +[[image:1733328461554-241.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
493 +
494 +In this section:
495 +
496 +* Delay before clearing the error, second;
497 +* Lock – a flag to block the error until the device is restarted.
498 +
499 +The “Power switch error” occurs when the device detects a shortage in contactor coil control circuit or an overheating of the power switch. Error is removed when the temperature of power switch is normal during “Delay before clearing the error” time.
500 +
501 +(% class="box warningmessage" %)
502 +(((
503 +If there is the "Power switch error", the **“Critical error” **is generated and **all relays open.**
504 +)))
505 +
506 +=== Charge contactor cycles ===
507 +
508 +The BMS Main 3 device protects the charging contactor against frequent switching.
509 +
510 +To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
511 +
512 +[[image:1733328461555-351.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
513 +
514 +In this section:
515 +
516 +* Enable – a flag to enable the protection;
517 +* Cycles threshold – a number of cycles in a given period, upon which the “CH contactor cycles error” is generated;
518 +* Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
519 +* Delay before setting the error, millisecond;
520 +* Delay before clearing the error, second;
521 +* Lock – a flag to block the error until the device is restarted.
522 +
523 +If there is a high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
524 +
525 +Error generation conditions:
526 +
527 +* the number of switching cycles of the charging contactor for the “Check time” time is greater than or equal to the “Cycles threshold” value. The error is generated with the “Delay before setting the error” delay.
528 +
529 +Conditions for removing the error:
530 +
531 +* the “Delay before clearing the error” time has passed since the error was generated.
532 +
533 +(% class="box infomessage" %)
534 +(((
535 +If there is the "CH contactor cycles error" error, the **charging **contactor opens.
536 +)))
537 +
538 +=== ​​​​​​​Discharge contactor cycles ===
539 +
540 +The BMS Main 3 device protects the discharging contactor against frequent switching.
541 +
542 +To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
543 +
544 +[[image:1733328461560-301.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
545 +
546 +In this section:
547 +
548 +* Enable – a flag to enable the protection;
549 +* Cycles threshold – a number of cycles in a given period, upon which the “DCH contactor cycles error” is generated;
550 +* Check time – a time in which the BMS counts switching cycles of the charging contactor, second;
551 +* Delay before setting the error, millisecond;
552 +* Delay before clearing the error, second;
553 +* Lock – a flag to block the error until the device is restarted.
554 +
555 +If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
556 +
557 +Error generation conditions:
558 +
559 +* the number of switching cycles of the discharging contactor for the “Check time” time is greater than or equal to the “Cycles threshold” value. The error is generated with the “Delay before setting the error” delay.
560 +
561 +Conditions for removing the error:
562 +
563 +* the “Delay before clearing the error” time has passed since the error was generated.
564 +
565 +(% class="box infomessage" %)
566 +(((
567 +If there is the "DCH contactor cycles error" error, the **discharging **contactor opens.
568 +)))
569 +
570 +=== Temperature sensors ===
571 +
572 +The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
573 +
574 +To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
575 +
576 +[[image:1733328471918-980.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
577 +
578 +In this section:
579 +
580 +* Enable – a flag to enable the protection;
581 +* Delay before setting the error, millisecond;
582 +* Delay before clearing the error, second;
583 +* Lock – a flag to block the error until the device is restarted.
584 +
585 +If there are no temperature sensors connected to any BMS Logic device or any temperature sensor of the BMS Logic is shorted, the "No temp. sensors" error and "Temp. sensor is shorted" error are generated respectively. These errors generated and removed with the “Delay before setting the error” and “Delay before clearing the error” delays.
586 +
587 +(% class="box warningmessage" %)
588 +(((
589 +If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error”** is generated and **all relays open.**​​​​​​​
590 +)))
591 +
592 +=== WDT reset ===
593 +
594 +If the BMS firmware hangs, the watchdog timer resets the device. The BMS can detect that the device was reset and generates the “WDT reset” error.
595 +
596 +To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
597 +
598 +[[image:1733328471919-183.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
599 +
600 +In this section:
601 +
602 +* Enable – a flag to enable the protection;
603 +* Delay before clearing the error, second;
604 +* Lock – a flag to block the error until the device is restarted.
605 +
606 +Conditions for removing the error:
607 +
608 +* the “Delay before clearing the error” time has passed from the device startup.
609 +
610 +(% class="box warningmessage" %)
611 +(((
612 +If there is the "WDT reset" error, the **“Critical error” **is generated and **all relays open.**
613 +)))
614 +
615 +=== ​​​​​​​Unallowable charging ===
616 +
617 +The BMS can detect that the battery is charging through the discharging circuit and protectively open the discharging contactor to prevent unallowable battery operation.
618 +
619 +To change the parameters of the unallowable charging protection, select the "Protections → Unallowable charging" section:
620 +
621 +[[image:1733328471920-923.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
622 +
623 +In this section:
624 +
625 +* Enable – a flag to enable the protection;
626 +* Delay before setting the error, second;
627 +* Delay before clearing the error, second;
628 +* Lock – a flag to block the error until the device is restarted.
629 +
630 +If there is charging the battery through the discharging circuit detected, the "Unallowable charging" error is generated.
631 +
632 +Error generation conditions:
633 +
634 +* the charging contactor is open, and the battery current is not zero during the “Delay before setting the error” time.
635 +
636 +Conditions for removing the error:
637 +
638 +* the battery current is zero during the “Delay before clearing the error” time.
639 +
640 +(% class="box infomessage" %)
641 +(((
642 +If there is the "Unallowable charging" error, the **discharging **contactor opens.
643 +)))
644 +
645 +=== ​​​​​​​Stuck contactor ===
646 +
647 +The BMS Main 3 device protects contactors against sticking.
648 +
649 +To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
650 +
651 +[[image:1733328471920-314.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="123" width="800"]]
652 +
653 +In this section:
654 +
655 +* Enable – a flag to enable the protection;
656 +* Delay before setting the error, millisecond;
657 +* Delay before clearing the error, second;
658 +* Check voltage – a flag to enable checking of voltage before and after contactors to detect the fact of contactor sticking;
659 +* Abnormal voltage difference – the difference of voltages before and after contactors at which BMS indicates and error;
660 +* Lock – a flag to block the error until the device is restarted.
661 +
662 +If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
663 +
664 +* The charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set or (if “Check voltage” flag is set) “Charging/Discharging” contactor is open and voltage difference before and after contactors is lower than “Abnormal voltage difference”.
665 +
666 +(% class="box warningmessage" %)
667 +(((
668 +If there is the “Stuck contactor” error, the **“Critical error” **is generated and **all relays open.**
669 +)))
670 +
671 +=== Contactor feedback ===
672 +
673 +The BMS Main 3 device can receive feedback signals from contactors and detect discrepancy between the control value and the feedback signal. To enable specific contactor protection, the feedback signal must be connected to the corresponding contactor feedback pin on the X3 header.
674 +
675 +To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
676 +
677 +[[image:1733328487096-144.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="109" width="800"]]
678 +
679 +In this section:
680 +
681 +* Enable – a flag to enable the protection;
682 +* Delay before setting the error, millisecond;
683 +* Delay before clearing the error, second;
684 +* Lock – a flag to block the error until the device is restarted.
685 +
686 +If there is a discrepancy at any contactor, the corresponding contactor feedback error is generated. Error generation conditions:
687 +
688 +* a command to the charging, precharging, discharging, charging/discharging or main contactor does not match its feedback value.
689 +
690 +(% class="box warningmessage" %)
691 +(((
692 +If there is the “Contactor feedback” error, the **“Critical error” **is generated and **all relays open.**
693 +)))
694 +
695 +=== ​​​​​​​Precharge ===
696 +
697 +BMS Main 3 device detects errors while pre-charging the load capacity by monitoring the current and voltage difference before and after contactors. To change the pre-charge monitoring parameters, select the "Protections → Precharge" section:
698 +
699 +[[image:1733328487097-648.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
700 +
701 +In this section:
702 +
703 +* Enable – a flag to enable the protection;
704 +* Delay before setting the error, millisecond;
705 +* Delay before clearing the error, second;
706 +* Lock – a flag to block the error until the device is restarted.
707 +
708 +As a result of the protection algorithms the “Precharge error” is generated. Error generation conditions:
709 +
710 +* precharging process cannot be finished (the precharge current does not decrease or voltages before and after contactors are not equal) during the “Delay before setting the error” time.
711 +
712 +(% class="box infomessage" %)
713 +(((
714 +If there is the “Precharge error”, **charging **and **discharging **contactors open.
715 +)))
716 +
717 +=== ​​​​​​​Insulation ===
718 +
719 +The BMS Main 3 device can detect a physical signal or CAN bus message from an external insulation monitoring device (such as Bender IR155, iso165C, BMD IMD) to monitor the insulation quality.
720 +
721 +To change the insulation monitoring parameters, select the "Protections → Insulation" section:
722 +
723 +[[image:1733328487098-963.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="121" width="800"]]
724 +
725 +In this section:
726 +
727 +* Enable – a flag to enable the protection;
728 +* Checking algorithm – isolation checking mode:
729 +** Always on – check is always performed;
730 +** On charging – check is performed only if “Charger connected” or “Charge request” is set;
731 +** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
732 +* Delay before setting the error, second;
733 +* Delay before clearing the error, second;
734 +* Lock – a flag to block the error until the device is restarted.
735 +
736 +The “Insulation fault” is set if the “Insulation status” signal is detected during the “Delay before setting the error” time. The “Insulation status” signal can be received through the discrete input or by the CAN bus from an insulation monitoring device. The “Insulation fault” is cleared if the “Insulation status” signal is cleared during the “Delay before clearing the error” time.
737 +
738 +(% class="box warningmessage" %)
739 +(((
740 +If there is the “Insulation fault”, the **“Critical error”** is generated and **all relays open.**
741 +)))
742 +
743 +=== HVIL ===
744 +
745 +The BMS Main 3 allows to control the high voltage interlock loop by applying current to a testing loop and monitoring the difference between the measured current and the required value.
746 +
747 +To change the HVIL measurement parameters, select the "Protections → HVIL" section:
748 +
749 +[[image:1733328487099-371.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="85" width="800"]]
750 +
751 +In this section:
752 +
753 +* Enable – a flag to enable the protection;
754 +* Lock – a flag to block the error until the device is restarted.
755 +
756 +If interlock loop breaks, the “HVIL error” is generated. Error clears if interlock loop is being restored.
757 +
758 +(% class="box warningmessage" %)
759 +(((
760 +If there is the “HVIL error”, the **“Critical error”** is generated and **all relays open.**
761 +)))
762 +
763 +=== Critical error ===
764 +
765 +To change the critical error parameters, select the "Protections → Critical error" section:
766 +
767 +[[image:1733328487100-898.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
768 +
769 +In this section:
770 +
771 +* Enable – a flag to enable the protection;
772 +* Delay before setting the error, millisecond;
773 +* Delay before clearing the error, second;
774 +* Lock – a flag to block the error until the device is restarted.
775 +
776 +The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
777 +
778 +* “Battery cover error”;
779 +* “Water”;
780 +* “Logic offline”;
781 +* “Cell count error”;
782 +* “ADC error”;
783 +* “Current sensor error”;
784 +* “Shunt offline”;
785 +* “Shunt error”;
786 +* “WDT reset”
787 +* “No temp. sensors”;
788 +* “Temperature sensor shorted”;
789 +* “Stuck contactor”;
790 +* “CH contactor feedback error”;
791 +* “DCH contactor feedback error”;
792 +* “Insulation fault”;
793 +* “PCH contactor feedback error”;
794 +* “CH/DCH contactor feedback error”;
795 +* “Main contactor feedback error”;
796 +* “High voltage fault”;
797 +* “Power switch error”;
798 +* “HVIL error”l
799 +* “Power fault”.
800 +
801 +The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
802 +
803 +(% class="box infomessage" %)
804 +(((
805 +If there is the “Critical error”, **all **contactors open.
806 +)))
807 +
808 +=== ​​​​​​​General error ===
809 +
810 +To change the general error parameters, select the "Protections → Critical error" section:
811 +
812 +[[image:1733328487101-216.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="262" width="800"]]
813 +
814 +In this section:
815 +
816 +* Enable – a flag to enable the protection;
817 +* Delay before setting the error, millisecond;
818 +* Delay before clearing the error, second;
819 +* Lock – a flag to block the error until the device is restarted;
820 +* Check: <error> – a flags to enable check of corresponding errors.
821 +
822 +The general error flag is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
823 +
824 +The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
825 +
826 +(% class="box infomessage" %)
827 +(((
828 +The state of the “General error” can be output to a discrete output or a power switch.
829 +)))
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